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  1. Replies
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    1,875

    Re: Material selection between PP and PE

    PP homopolymer with a fractional % HDPE gives properties similar to PP Copolymer (crack resistance) You must try your resin combos in sampling and do dart/drop tests to determine what you want...
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    4,710

    Re: Help!, Warped walls with PP

    Any colorant involved?

    KOM brent
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    4,905

    Re: Universal Setup Data

    Universal set-up sheets are useful (in my opinion) for transferring tools from press to press. Often a specific set-up sheet is also used for each particular press,showing positions,temps,velocities,...
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    Re: Polypropylene mix

    Mix PE and PP homopolymer to hope for copolymer characteristics. Consult your resin supplier for proper PP grade.

    KOM
    brent
  5. Re: A simple mold to help determine material shrinkage

    What process do you use?

    KOM

    brent
  6. Re: Galvanized Pipe or Plastic Pipe for Plant water supply?

    Original query concerned plant water piping.

    KOM

    brent
  7. Re: Galvanized Pipe or Plastic Pipe for Plant water supply?

    Plastic (CPVC) doesn't rust or corrode!

    KOM

    brent
  8. Replies
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    2,306

    Re: noise at start of opening phase

    Do you have "clamp Decompress" feature on press?
    Are you using it?
    If not try it!

    KOM
    brent
  9. Replies
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    2,558

    Re: Thermolator Help!!

    YES!

    KOM
    brent
  10. Re: PET Injection mold, preforms get stuck before extraction.

    Suspect over-packing!

    KOM

    brent
  11. Replies
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    116,253

    Re: What Spare Parts to buy for Mold

    Yes, heat bands, they go out a lot!
    Spray, for trip and place desiccant bags in mold, and there is a wrap against moisture, kind of like a TYVEK, that many molders use to prevent moisture damage,...
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    116,253

    Re: What Spare Parts to buy for Mold

    Questions:
    Resin being used?
    Cycle time?
    PM Schedule?
    Care given during run(mold protection etc)


    Multi cavity hi speed molds like closures of 32 cavity + sometimes have 10 to 25% spare...
  13. Replies
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    113,563

    Re: Cheap/DIY Thermolator?

    I know a guy that made one with a gas grill, small 5 gallon tank, and a modulating valve, no pump other than central system. It worked!

    KOM

    brent
  14. Replies
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    11,743

    Re: Material cushion variation

    If I ever saw a process with ZERO cushion variation out to 3 decimal places, I'd suspect alien (ET Type) intervention?

    KOM

    brent
  15. Replies
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    11,743

    Re: Material cushion variation

    What's the problem?

    Are you making a mountain out of a mole hill?

    KOM

    brent
  16. Replies
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    4,501

    Re: Automation - Box Indexing

    Contact: HFA (Harvard Factory Automation) or MAC (Molding Automation Concepts)

    KOM

    brent
  17. Replies
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    3,586

    Re: High-Temp. Purge

    DynaPurge E and E2

    KOM

    brent
  18. Thread: blocking cavity

    by brentb
    Replies
    6
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    2,651

    Re: blocking cavity

    We worried about the same thing in the Service!

    KOM

    brent
  19. Thread: blocking cavity

    by brentb
    Replies
    6
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    2,651

    Re: blocking cavity

    Enlighten us on the "obvious reasons" please! Imagine lead in a BECU mold component?

    KOM

    brent
  20. Thread: blocking cavity

    by brentb
    Replies
    6
    Views
    2,651

    Re: blocking cavity

    Try solder instead of AL!

    KOM
    brent
  21. Replies
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    11,743

    Re: Material cushion variation

    Nylon should be consistently dried.

    KOM

    brent
  22. Replies
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    Re: Van Dorn HT 85 buttons not working

    What"Buttons"?

    Can't find someone capable of pushing a button? Hire a temp or student for a day or get the IT guy to "push a button"!

    KOM

    brent
  23. Re: Van Dorn 320 HT series with Pathfinder 1000 control thermocouple break alarm.

    Those controls were known to go randomly "brain dead". I never heard of a permanent fix. There are companies that specialize in retrofitting a new (usually BC) control unit.

    Van Dorn came out with...
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    2,448

    Re: Random Splay on a part using Celcon M90

    Test your mixed/contamination theory by mixing some and observing
    Could you have a barrel zone overheating

    KOM

    brent
  25. Replies
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    Re: Arburg CPU 2.5280A ic20 identification

    Try these people:
    https://www.controlrepair.com/

    KOM

    brent
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